Well, the obvious culprits include a low fiber diet, repeatedly ignoring the urge to go, not drinking enough water, or a lack of exercise.

Forest dieback refers to the phenomena of a stand of trees losing health and dying without an obvious culprit.

But a less obvious culprit is what we see on commercial television: nonstop food.

In fact, these were obvious culprits all along, which is why Atkins and the low-carb-diet doctors pounced on them early.

An obvious culprit, in the minds of players and officials from both sides, is preparation.

Both airborne nitrogen and the more direct influence of hundreds of bathers in summer are obvious culprits.

Artists who've been on the avant-garde circuit for a good two decades are among the most obvious culprits.

Politicians themselves, having spent the last few decades debasing the institutions of democracy, are the most obvious culprits.

A decade ago the Central Intelligence Agency might have been the obvious culprit.

And Anthony will be the obvious culprit, so there will be no investigation into anyone else.